Impedance Characteristics of the Skin-Electrode Interface of Dry Textile Electrodes for Wearable Electrocardiogram

  • Fan Xiong
  • Dongyi ChenEmail author
  • Zhenghao Chen
  • Chen Jin
  • Shumei Dai
Conference paper
Part of the Internet of Things book series (ITTCC)


Long-term dynamic Electrocardiogram (ECG) monitoring is considered as one of the main methods of preventing heart diseases. Ag/AgCl wet electrodes, although used clinically, are not suitable for long-time wearing. Dry textile electrodes, however, have won much attention for surmounting these drawbacks. This essay explains the impedance characteristics of the skin-electrode interface of wearable dry textile electrodes for measuring ECG. Specifically, through analyzing the characteristics of dry textile electrodes, the skin-electrode interface equivalent circuit models were built, the textile electrodes were made and the electrochemical impedance spectroscopy (EIS) for the skin-electrode interface was measured. Finally, the influence of each parameter to the interface was assessed. The research illustrated that interface of dry textile electrodes were more complicated than that of standard Ag/AgCl electrodes. The interface impedance |Z| and the interface phase were relevant to the signal frequency and the key of descending the interface impedance was to lower the polarization resistance. The textile electrodes have the Constant Phase Angle Element (CPE) behavior due to the dispersion effect of the time constant within the Frequency of ECG measuring.


Wearable electrocardiogram Textile electrode Skin-electrode interface Constant phase angle element 



This work is supported by National Natural Science Foundation of China (no. 61572110) and National Key Research and Development Plan of China (no. 2016YFB1001401).


  1. 1.
    Sahoo, S., Biswal, P., Das, T., Sabut, S.: De-noising of ECG signal and QRS detection using Hilbert transform and adaptive thresholding. Procedia Technol. 25, 68–75 (2016)CrossRefGoogle Scholar
  2. 2.
    Weder, M., Hegemann, D., Amberg, M., Hess, M., Boesel, L.F., Abcherli, R., Meyer, V.R., Rossi, R.M.: Embroidered electrode with silver/titanium coating for long-term ECG monitoring. Sensors 15, 1750 (2015)CrossRefGoogle Scholar
  3. 3.
    Chi, Y.M., Jung, T.P., Cauwenberghs, G.: Dry-contact and noncontact biopotential electrodes: methodological review. IEEE Rev. Biomed. Eng. 3, 106–119 (2010)CrossRefGoogle Scholar
  4. 4.
    Yokus, M.A., Jur, J.S.: Fabric-based wearable dry electrodes for body surface biopotential recording. IEEE Trans. Biomed. Eng. 63, 423 (2016)CrossRefGoogle Scholar
  5. 5.
    Meziane, N., Yang, S., Shokoueinejad, M., Webster, J.G., Attari, M., Eren, H.: Simultaneous comparison of 1 gel with 4 dry electrode types for electrocardiography. Physiol. Meas. 36, 513 (2015)CrossRefGoogle Scholar
  6. 6.
    Meziane, N., Webster, J.G., Attari, M., Nimunkar, A.J.: Dry electrodes for electrocardiography. Physiol. Meas. 34, R47–R69 (2013)CrossRefGoogle Scholar
  7. 7.
    Dai, M., Xiao, X., Chen, X., Lin, H., Wu, W., Chen, S.: A low-power and miniaturized electrocardiograph data collection system with smart textile electrodes for monitoring of cardiac function. Australas. Phys. Eng. Sci. Med. 39, 1–12 (2016)CrossRefGoogle Scholar
  8. 8.
    Andreoni, G., Fanelli, A., Witkowska, I., Perego, P., Fusca, M., Mazzola, M., Signorini, M.G.: Sensor validation for wearable monitoring system in ambulatory monitoring. In: International Conference on Pervasive Computing Technologies for Healthcare, pp. 169–175 (2013)Google Scholar
  9. 9.
    Xu, P.J., Zhang, H., Tao, X.M.: Textile-structured electrodes for electrocardiogram. Text. Prog. 40, 183–213 (2008)CrossRefGoogle Scholar
  10. 10.
    Mottaghitalab, V., Haghi, A.K., Haghdoost, F.: Comfortable textile-based electrode for wearable electrocardiogram. Sens. Rev. 35, 20–29 (2015)CrossRefGoogle Scholar
  11. 11.
    Pola, T., Vanhala, J.: Textile electrodes in ECG measurement. In: International Conference on Intelligent Sensors, Sensor Networks and Information, pp. 635–639 (2007)Google Scholar
  12. 12.
    Puurtinen, M.M., Komulainen, S.M., Kauppinen, P.K., Malmivuo, J.A.V.: Measurement of noise and impedance of dry and wet textile electrodes, and textile electrodes with hydrogel. In: International Conference of the IEEE Engineering in Medicine and Biology Society, p. 6012 (2006)Google Scholar
  13. 13.
    Beckmann, L., Neuhaus, C., Medrano, G., Jungbecker, N., Walter, M., Gries, T., Leonhardt, S.: Characterization of textile electrodes and conductors using standardized measurement setups. Physiol. Meas. 31, 233 (2010)CrossRefGoogle Scholar
  14. 14.
    Marozas, V., Petrenas, A., Daukantas, S., Lukosevicius, A.: A comparison of conductive textile-based and silver/silver chloride gel electrodes in exercise electrocardiogram recordings. IEEE Trans. Instrum. Meas. 63, 1412–1422 (2014)CrossRefGoogle Scholar
  15. 15.
    Taji, B., Shirmohammadi, S., Groza, V., Batkin, I.: Impact of skin-lectrode interface on electrocardiogram measurements using conductive textile electrodes. J. Electrocardiol. 44, 189 (2011)Google Scholar
  16. 16.
    Norlin, A., Pan, J., Leygraf, C.: Investigation of interfacial capacitance of Pt, Ti and TiN coated electrodes by electrochemical impedance spectroscopy. Biomol. Eng. 19, 67 (2002)CrossRefGoogle Scholar
  17. 17.
    Mcadams, E.T., Jossinet, J., Lackermeier, A., Risacher, F.: Factors affecting electrode-gel-skin interface impedance in electrical impedance tomography. Med. Biol. Eng. Comput. 34, 397–408 (1996)CrossRefGoogle Scholar
  18. 18.
    Mcadams, E.T., Jossinet, J.: Tissue impedance: a historical overview. Physiol. Meas. 16, A1–13 (1995)CrossRefGoogle Scholar
  19. 19.
    Rosell, J., Colominas, J., Riu, P., Pallas-Areny, R., Webster, J.G.: Skin impedance from 1 Hz to 1 MHz. IEEE Trans. Biomed. Eng. 35, 649–651 (1988)CrossRefGoogle Scholar
  20. 20.
    Mcadams, E.: Biomedical Electrodes for Biopotential Monitoring and Electrostimulation, pp. 31–124. Springer, US (2011)Google Scholar
  21. 21.
    McAdams, E.T., Jossinet, J.: DC nonlinearity of the solid electrode-electrolyte interface-impedance. Innov. Technol. Biol. Med. 12, 329–343 (1991)Google Scholar
  22. 22.
    Kerner, Z., Pajkossy, T.: On the origin of capacitance dispersion of rough electrodes. Innov. Technol. Biol. Med. 46, 207–211 (2015)CrossRefGoogle Scholar
  23. 23.
    Webster, J.G.: Medical instrumentation-application and design. J. Clin. Eng. 3, 306 (1998)CrossRefGoogle Scholar
  24. 24.
    Webster, J.G., Clark, J.W.: Medical Instrumentation: Application and Design, pp. 197–221. Mifflin, HoughtonGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Fan Xiong
    • 1
  • Dongyi Chen
    • 1
    Email author
  • Zhenghao Chen
    • 1
  • Chen Jin
    • 1
  • Shumei Dai
    • 1
  1. 1.School of Automation EngineeringUniversity of Electronic Science and Technology of ChinaChengduChina

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